Integrated SDA and ebullated-bed process

Details Integrated SDA and ebullated-bed process Integrated SDA and ebullated-bed process

2007-10-09

2007-10-09

Caldarola, Glenn (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S086000, C208S039000, C208S078000, C208S107000

Reexamination Certificate

active

11005062

ABSTRACT:
This invention relates to a novel integrated method for economically processing vacuum residue from heavy crude oils. This is accomplished by utilizing a solvent deasphalter (SDA) in the first step of the process with a C3/C4/C5solvent such that the DAO product can thereafter be processed in a classic fixed-bed hydrotreater or hydrocracker. The SDA feed also includes recycled stripper bottoms containing unconverted residue/asphaltenes from a downstream steam stripper unit.The asphaltenes from the SDA are sent to an ebullated-bed reactor for conversion of the residue and asphaltenes. Residue conversion in the range of 60-80% is achieved and asphaltene conversion is in the range of 50-70%. The overall residue conversion, with the DAO product considered non-residue, is in the range of 80 W %-90 W % and significantly higher than could be achieved without utilizing the present invention.

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patent: 6179995 (2001-01-01), Cash et al.
patent: 6270654 (2001-08-01), Colyar et al.

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